Added a stub driver implementation for Mesa EGL.

ppapi/ppapi.gyp

 # Copyright (c) 2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
+  'includes': [
+    '../third_party/mesa/mesa.gypi',
+  ],
   'variables': {
     'chromium_code': 1,  # Use higher warning level.
   },
   'target_defaults': {
     'conditions': [
       # Linux shared libraries should always be built -fPIC.
       #
       # TODO(ajwong): For internal pepper plugins, which are statically linked
       # into chrome, do we want to build w/o -fPIC?  If so, how can we express
       # that in the build system?
@@ skipping 232 matching lines @@
           'cflags': ['-Wextra', '-pedantic'],
         }],
         ['OS=="mac"', {
           'xcode_settings': {
             'WARNING_CFLAGS': ['-Wextra', '-pedantic'],
            },
         }]
       ],
     },
     {
+      'target_name': 'ppapi_egl',
+      'type': 'static_library',
+      'dependencies': [
+        'ppapi_c',
+      ],
+      'include_dirs': [
+        'lib/gl/include',
+      ],
+      'defines': [
+        # Do not export internal Mesa funcations. Exporting them is not
+        # required becuase we are compiling both - API dispatcher and driver
+        # into a single library.
+        'PUBLIC=',
+        # Define a new PPAPI platform.
+        '_EGL_PLATFORM_PPAPI=_EGL_NUM_PLATFORMS',
+        '_EGL_NATIVE_PLATFORM=_EGL_PLATFORM_PPAPI',
+      ],
+      'conditions': [
+        ['OS=="win"', {
+          'defines': [
+            '_EGL_OS_WINDOWS',
+          ],
+        }],
+        ['OS=="mac"', {
+          # TODO(alokp): Make this compile on mac.
+          'suppress_wildcard': 1,
+        }],
+      ],
+      'sources': [
+        # Mesa EGL API dispatcher sources.
+        '<@(mesa_egl_sources)',
+        # PPAPI EGL driver sources.
+        'lib/gl/egl/egldriver.c',
+        'lib/gl/egl/egldriver_ppapi.c',
+      ],
+    },
+    {
       'target_name': 'ppapi_example',
       'dependencies': [
         'ppapi_cpp'
       ],
       'xcode_settings': {
         'INFOPLIST_FILE': 'example/Info.plist',
       },
       'sources': [
         'example/example.cc',
       ],
@@ skipping 347 matching lines @@
         ['OS=="win"', {
         }],
         ['OS=="linux"', {
         }],
         ['OS=="mac"', {
         }]
       ],
     },
   ],
 }